function s1_goto_dir(){
	cd "$1"
}

function s2_touch_empty_file_with_given_name(){
	touch "$1"
}

function s3_make_directories(){
	mkdir -p projects/{git,backup}
}

function s4_create_6_files(){
	touch projects/linux{1,2}_{centos,redhat,c_programming}
}

function s5_make_directories_in_git(){
	mkdir -p projects/git/linux{1,2}
}

function s6_move_files_to_dir_1_or_2(){
	mv ./projects/linux1_* ./projects/git/linux1
	mv ./projects/linux2_* ./projects/git/linux2
}

function s7_create_package_and_compress(){
	tar -czvf ./projects/backup/git.tar.gz ./projects/git
}

function s8_delete_dir_git(){
	rm -rf ./projucts/git
}

function s9_recover_from_git_tar_gz_backup(){
	tar -zxvf ./projects/backup/git.tar.bz2 ./projects/git
}

function s10_create_package_and_compress(){
	tar -jcvf ./projects/backup/git.tar.bz2 ./projects/git
}

function s11_find_and_sort_alphabetically_all_created_files_and_dirs(){
	find ./projects |sort
}

function s12_get_next_15_minutes_boundary(){
	date -d "@$(($(date +%s)-$(date +%s) % 900 + 900))" +"%Y-%m-%d_%H:%M:%S"
}



















